Piezoelectricity Ceramics Character Parameter Measuring System Based on DDS

By using AD9858 as the primary part of the signal source,a new model of measuring system for piezoelectricity ceramics character parameter was built up.Taking use of the parallel port of the computer and through the peripheral interface circuit, circuit controlling and data acquisition can be achieved.The system can measure the harmonic frequency and antiresonance frequency,free capacity,and dynamic resistor at the same time.